Dial-revolving device



L. H. FLERON I DIAL REVOLVING DEVICE Filed Feb. 15, 1923 INVENTOR ATTORNEY I I Patented duly 24531923; g

\ To all whom it rrtay concern:

'UNH

LOUIS e. rrnnon, or rnnnron, new Jnnsn r.

' Application filed rebmar it, 1923. Serial in. elegant.

Be i known that-,1, Louis FILE'ItON, a citizen of the United States, residing at Trenton, county of Mercer, and State of New Jersey, have invented new and useful Improvements in Dial-Revolving Devices,

' of which the following is a ful1,clear, and

exact specification,

My invention relates 'to electrical devices and refers particularly to devices suitable for the effective revolution of dials employed, in radio circuits.

In'order to tune in the necessary circuits in radio sets, it is necessary to turn the dial,

or dials, therein so that the-circuits maybe brought into resonance. I As the effectiveness of the soundfresults is dependent-upon the accuracy of the circuit resonance and, asthe latter is depend? ent upon th revolution of the necessarydials, itis evident that the manipulation of such dials is of the highest importance.

Considerable difiiculty is experienced in obtaining the particular point of maximum signal strength and clarity'of tone, due to the fact that the delicacy of the operation demands the most careful manipulation-of the dials and that the slightest variation of these from the proper position greatly affects the results.

it is therefore imperative that the revolution of th dials be accurate, delicate and capable of precise adjustment.

The object of my invention 1s a means "whereby dials of the character described may be operated with much greater accuracy and delicacy than can be obtained by their direct revolution, thus obtainingmore satisfactory and correct results from the circuits connected therewith.

In th accompanying drawingsillustrating one form of the device of my invention,

similar parts are designated by similarnumerals.

Figure 1 is a top plan view of one form of the device of my ihventiom-shown in conjunction with a revoluble dial.

Figure 52, is a side plan view of Figure 1.

Figure 3 is an enlarged cross-section through the line 3-3 of Figure 2.

The particular form of the device of my invention, shown in the accompanying drawings, comprises a head member having the upper member 10, composed preferably of hard rubber or other similar or suitable material, and the lower member 11, composed preferably of soft' or unvulcanized rubber or other similar material, forpurposes described later, the two members be- Fixellly attached to the head member is a supporting shaft 13, being shown in the drawings as threaded within the head, although other means of attachment may be employed.

The shaft 13 carries the fixedly attached, or integrah'annular flange 14.

Slidable over and revoluble upon the shaft 13 is a sleeve 15, the upper portion of which has the outwardly extended flange 16 and the outwardly extended flange 17. The sleeve 15 carries the exterior threaded face 18,

The shaft 13 xtends through the cap 19,

the inner face of which is threaded to mesh with the exterior threaded sleeve 15. f

A spiral spring 20 abuts upon the flange 14: and the inner lower face of the cap 19. The device, as shown, is mounted upon the plate, or boarc l,.21, by removing the cap 19, passing the lower portion-of the device through an opening, or hole,in the plate 21, until the flange 16 abuts upon it and then screwing the cap 19 into place until it abuts upon t e under faceof the plate 21.

The device will then be positioned as shownrin full lines in Figure 2 and in Figure 3. v e If the head is pressed downwardly, the shaft 13 will pass through the sleeve 15 and th cap 19 compressing the spring 20, as shown in dotted lines in Figure 2. When the downward pressure upon the head is released, the spring 28 will raise the head member-to its original positien.

'lhe method of operation of my device in face 18 of the the rotation of a disc is shown in Figures :1

l and 2.

Upon the board 21 is mounted a reroluhie dial hav ng the annular plate 22 and the upwardly extended head member 23, the

outer edge 24 of the plate 232 being outward- J 24 of the revoluble dial, when the head member 10, 11, is pressed downwardly, and

th abutment will be broken when the downward pressure is released, as shown in Figures 1 and 2.

In obtaining the proper circuit connection when the revoluble dial is employed in radio circuits, it is customary to revolve the revoluble dial by means of its head 23, this operation'being' satisfactory until it is desirable to obtain a practically absolute resonance of circuit, in which event, the dial must :be moved with greater accuracy .than can be readily obtained by this method.

This difficulty incident to direct revolution of the dialis overcome bythe employment of my device. The head 10, 11 of my {device is pressed downwardly until there is contact between the beveled edges 24 and 25, when the revolution of the head l0, 11 will cause a revolution of the revoluble dial with much greater accuracy than can be obtained by direct revolution, as my device acts as a low gear for this purpose.

It is to be particularly noted that as the member 11 of my device is of soft rubber or other similar material, the contact with the revoluble dial is one of close abutment preventing slip and that it does not interfere with the sound transmission during tuning.

A further advantage of great value and usefulness is that when the revoluble dial is properly placed, the release of the lead 10,

1. In a dial revolving device, in combina tion, ahead, a shaft carried by the head, a-

loose sleeve carried by the shaft, means for preventing the sleeve from shaft displacement, a removable cap carried by the sleeve and means for retaining the head from contact "with the sleeve.

2. In-' a dial revolving device, in combina tion, a head, a shaft carried by the head, a

ing an exterior threaded face carried by the I shaft, means for limiting the longitudinal movement of the sleeve along the shaft, a cap threaded to the sleeve and meansvcapable of retaining the head from contact with the sleeve. f I

4. In a diaLrevolvin device, in combination, a head the lower ace of which is composed of a comparatively soft material, a shaft carried by the head, a loose sleeve having an exterior threaded face carried by the shaft, means for limiting the lon "itudinal movement of the sleeve along the s aft, a cap threaded to the sleeveand spring means normally retaining the head from contact with the sleeve.

5. In a dial revolving device, in combination, a head the lower beveled face of which is composed of unvulcanized rubber, a shaft fixedly attached to the head, a loose sleeve carried by the shaft, a flange fixedly attached to the shaft preventing the removal of the sleeve from the shaft, a cap carried by the sleeve and spring means normally retaining the sleeve in abutment with the shaft nge.

, 6. In a dial revolving device, in combina tion, a head the lower beveled face of which is composed of a yielding substance, a shaft fixedly attached to the head, a loose sleeve having an exterior threaded face carried by the shaft, an exteriorly extended flange upon the upper portion of the sleeve, an interiorly extended flange upon theupperportion of the sleeve, a flange fixedly attached to the shaft, positioned below the interior flange of the sleeve and preventing the removal of the latter, a cap threaded upon the lower portion of the sleeve and spring means within the sleeve and cap whereby the interior flange of the sleeve will normally be in abutment with the shaft flange.

Signed at New York city in the county of New York and State of New York this 13th day of February, 1923.

LoUrs H. FLEaoN.

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